Özgün İnşaat, leading company of KRK Holding, was established in 1993. The company operates in fields of tunneling, transportation, infrastructure, superstructure, mining and energy. Domestically; the company has taken part in major parts of Metro İstanbul, while completing various projects for Municipality of İstanbul, such as “4.Levent - Taksim Metro Line”, “Taksim - Kabataş Funicular System Construction” and multiple sewage tunnels for İSKİ Istanbul Water and Sewerage Administration. Özgün İnşaat completed “Black Sea Highway / Nefise Akçelik Tunnel construction between Perşembe - Bolaman” for General Directorate of Highways (KGM), “İzmir Light Rail System Construction, Üçyol Station Project” for Municipality of İzmir. Extending its operations in Algeria, Özgün İnşaat has signed various successful contracts abroad. In Algeria, Özgün İnşaat currently has 5 on-going projects, besides the 3 projects is already completed. The company has increased its reputation and prestige while realizing new projects with the world’s largest contractors such as, CCECC (Chinese), TEXEIRA DUARTE (Portuguese), ENYSE (Spanish) and ETRHB (Algerian) in Algeria. “Tizi Ouzou - Oued Aïssi Railway Project” for ANESRIF and “Bejaia Highway Tunnel Project” for Public Works Department Bejaia were completed. “Thenia - Tizi Ouzou Railway Project”, “El Affroun - Khemis Miliana Railway Project”, “Thenia - Bordj Bou Arreridj Railway Project” for ANESRIF, “Kherrata Motorway Project” for Public Works Department Bejaia and “Tizi Ouzou Highway Project” for Algeria Highways Administration (ADA) are on-going projects. As a member of Turkish Contractors Association, Özgün İnşaat holds ISO 9001 Quality Management System, ISO 14001 Environmental Management System and OHSAS 18001 Occupational Health and Safety Management System Certificates.